Annex C (informative) Compatibility [diff] (original) (raw)

Affected subclause: [cpp.predefined]

Change: Whether __STDC__ is defined and if so, what its value is, areimplementation-defined.

Rationale: C++ is not identical to C.

Mandating that __STDC__be defined would require that translators make an incorrect claim.

Effect on original feature: Change to semantics of well-defined feature.

Difficulty of converting: Semantic transformation.

How widely used: Programs and headers that reference __STDC__ are quite common.